CN109425097B - Gas water heater - Google Patents
Gas water heater Download PDFInfo
- Publication number
- CN109425097B CN109425097B CN201710777955.1A CN201710777955A CN109425097B CN 109425097 B CN109425097 B CN 109425097B CN 201710777955 A CN201710777955 A CN 201710777955A CN 109425097 B CN109425097 B CN 109425097B
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- China
- Prior art keywords
- heat exchanger
- water heater
- gas water
- combustion chamber
- catalytic
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 230000003197 catalytic effect Effects 0.000 claims abstract description 63
- 238000002485 combustion reaction Methods 0.000 claims abstract description 51
- 239000000779 smoke Substances 0.000 claims abstract description 15
- 210000001503 joint Anatomy 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 44
- 239000003054 catalyst Substances 0.000 description 10
- 238000007084 catalytic combustion reaction Methods 0.000 description 9
- 239000002737 fuel gas Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/124—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/02—Casings; Cover lids; Ornamental panels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
Abstract
The invention discloses a gas water heater, which comprises a fan, a gas inlet pipeline and an air inlet valve connected in series on the gas inlet pipeline, wherein the air inlet valve is connected in series with the air inlet pipeline; the gas water heater further comprises: a jacket heat exchanger enclosed to form an upper combustion chamber; a catalytic combustor installed in the upper combustion chamber; a bottom shell, a lower combustion chamber is formed at the lower part of the bottom shell; a smoke outlet is arranged on the bottom shell; the bottom shell is in butt joint with the jacket heat exchanger to form a heat exchange chamber; the preheating burner is arranged in the lower combustion chamber; one end of the heat collection cylinder is connected with the upper combustion chamber, and the other end is connected with the lower combustion chamber; the main heat exchanger is arranged in the heat exchange chamber and sleeved on the periphery of the heat collection cylinder; and the controller is used for controlling the preheating burner to burn to heat the catalytic burner when the gas water heater is started and controlling the preheating burner to be extinguished when the temperature of the catalytic burner reaches above the catalytic light-off temperature. The gas water heater can fully improve the energy utilization rate and reduce the emission of harmful substances.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a gas water heater.
Background
Currently, the combustion mode mainly adopted in the gas water heater industry is flame combustion, namely, the oxidation reaction of fuel and oxygen or air which rapidly releases heat and emits light and occurs in the form of flame. The combustion mode has the advantages of incomplete combustion, low thermal efficiency and low energy utilization rate, and more pollutants are generated in the combustion process. Catalytic combustion is a combustion reaction of fuel under a certain temperature condition under the action of a catalyst. Compared with flame combustion, the catalytic combustion temperature is lower, the combustion is safer, and the catalytic combustion is a relatively efficient and clean combustion mode. Therefore, the traditional flame combustion is replaced by relatively efficient and clean catalytic combustion, so that the energy utilization rate can be effectively improved, and the emission of harmful substances can be reduced.
Disclosure of Invention
The invention mainly aims to provide a gas water heater, and aims to solve the technical problems that the gas water heater in the prior art is low in energy utilization rate and is easy to generate harmful substances.
In order to achieve the above purpose, the invention provides a gas water heater, which comprises a fan, a gas inlet pipeline and an air inlet valve connected in series with the gas inlet pipeline; the gas water heater further comprises:
the jacket heat exchanger is arranged in a downward opening manner and is enclosed to form an upper combustion chamber;
a catalytic combustor mounted in the upper combustion chamber;
the bottom shell is upwards opened, and a lower combustion chamber is formed at the lower part of the inner cavity of the bottom shell; the bottom shell is provided with a smoke outlet communicated with the inner cavity of the bottom shell; the opening of the bottom shell is in sealed butt joint with the opening of the jacket heat exchanger to form a heat exchange chamber;
a preheating burner installed in the lower combustion chamber;
a heat collection cylinder arranged in the heat exchange chamber and provided with two open ends, one end of the heat collection cylinder is connected with the upper combustion chamber, and the other end of the heat collection cylinder is connected with the lower combustion chamber;
the main heat exchanger is arranged in the heat exchange chamber, sleeved on the periphery of the heat collection cylinder and communicated with the jacket heat exchanger;
a temperature sensor for detecting a temperature of the catalytic burner;
the controller is electrically connected with the temperature sensor; the controller is used for controlling the preheating burner to burn to heat the catalytic burner when the gas water heater is started, and controlling the preheating burner to be extinguished when the temperature of the catalytic burner reaches above the catalytic light-off temperature.
Preferably, the jacket heat exchanger comprises an inner container and an outer shell which are mutually nested from inside to outside, the inner container is surrounded to form an upper combustion chamber, the inner container comprises a spherical crown-shaped inner top wall and a cylindrical inner side wall which extends downwards from the edge of the inner top wall, the concave surface of the inner top wall faces downwards, and the catalytic burner extends horizontally and is arranged opposite to the concave surface of the inner top wall.
Preferably, the inner container further comprises an annular flanging which is turned outwards from the bottom edge of the inner side wall, the outer shell comprises a spherical crown-shaped outer top wall and a cylindrical outer side wall which extends downwards from the edge of the outer top wall, the concave surface of the outer top wall faces downwards, and the bottom edge of the outer side wall is in sealing connection with the flanging.
Preferably, the water inlet of the jacket heat exchanger is arranged at the top of the shell.
Preferably, the bottom shell comprises an upper accommodating cylinder and a lower accommodating cylinder arranged upwards in an open mode, the upper end of the upper accommodating cylinder is in sealed butt joint with the opening of the jacket heat exchanger, a connecting port is formed in the middle of the bottom wall of the upper accommodating cylinder, the opening of the lower accommodating cylinder is in sealed butt joint with the connecting port, and the lower combustion chamber is formed in the lower accommodating cylinder.
Preferably, the lower end opening of the heat collection cylinder is in sealing butt joint with the connecting port, and the side wall of the heat collection cylinder and the side wall of the lower accommodating cylinder are integrally arranged.
Preferably, the upper end of the heat collection cylinder supports the catalytic burner, and a plurality of ventilation holes are formed in the side wall of the upper end of the heat collection cylinder along the circumferential direction.
Preferably, the main heat exchanger is attached to the inner wall surface of the upper accommodating cylinder, a water inlet interface is arranged at the joint of the main heat exchanger and the upper accommodating cylinder, and the water inlet interface extends to the outer side of the upper accommodating cylinder and is communicated with the main heat exchanger;
a water outlet port is arranged at the outer wall surface of the jacket heat exchanger adjacent to one end of the bottom shell, and the water outlet port is communicated with the inner cavity of the jacket heat exchanger; the gas water heater also comprises a connecting pipe connected with the water outlet interface and the water inlet interface.
Preferably, the smoke outlet is arranged between the main heat exchanger and the bottom wall of the upper accommodating cylinder;
preferably, the controller is further configured to control the fan to increase the air intake amount of air in unit time and control the intake valve to increase the air intake amount of fuel gas in unit time to extinguish the preheating burner when the temperature of the catalytic burner reaches above the catalytic light-off temperature.
According to the gas water heater, the catalytic burner is arranged above the preheating burner, flame combustion is firstly carried out on the preheating burner, the heat collecting cylinder separates the lower combustion chamber from the smoke outlet, and under the guiding action of the heat collecting cylinder, heat radiation and hot air flow intensively act on the catalytic burner, so that the heating speed of the catalytic burner can be improved. When the temperature of the catalytic combustor reaches above the preset catalytic light-off temperature, self-sustaining catalytic combustion of the mixed gas of air and fuel gas can occur on the catalytic combustor, and the fuel gas can be combusted on the catalytic combustor at a lower temperature due to the catalytic action of the catalyst, and the fuel gas is almost completely combusted, so that CO emission is almost avoided. The temperature of the flue gas after catalytic combustion is lower than that of flame combustion, so that low emission of nitrogen oxides can be realized. The hot air flow in the upper combustion chamber can firstly exchange heat with the jacket heat exchanger, then flows downwards along the annular space between the heat exchange chamber and the heat collection cylinder to exchange heat with the main heat exchanger arranged below the jacket heat exchanger, and finally is discharged through the smoke outlet, so that the water is heated twice in the heat exchange process, and the energy utilization rate and the heating efficiency are effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gas water heater according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a cross-sectional structure of the gas water heater in FIG. 1;
FIG. 3 is a schematic view of another cross-sectional structure of the gas water heater of FIG. 1;
FIG. 4 is a schematic diagram of a control module of a gas water heater according to an embodiment of the invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a gas water heater.
In the embodiment of the invention, as shown in fig. 1 to 4, the gas water heater comprises a fan 1, a gas inlet pipeline (not shown) and an inlet valve (not shown) connected in series with the gas inlet pipeline; the gas water heater further comprises:
the jacket heat exchanger 3 is arranged in a downward opening manner and is enclosed to form an upper combustion chamber 30;
a catalytic burner 4 mounted in the upper combustion chamber 30;
the bottom shell 5 is upwards opened, and a lower combustion chamber 51 is formed at the lower part of the inner cavity of the bottom shell 5; the bottom shell 5 is provided with a smoke outlet 52 communicated with the inner cavity of the bottom shell; the opening of the bottom shell 5 is in sealed butt joint with the opening of the jacket heat exchanger 3 to form a heat exchange chamber 350;
a preheating burner 6 installed in the lower combustion chamber 51;
a heat collecting cylinder 7 installed in the heat exchange chamber 350 and having two open ends, one end connected with the upper combustion chamber 30 and the other end connected with the lower combustion chamber 51;
the main heat exchanger 8 is arranged in the heat exchange chamber 350, sleeved on the periphery of the heat collection cylinder 7 and communicated with the jacket heat exchanger 3;
a temperature sensor 9 for detecting the temperature of the catalytic combustor 4;
a controller 10 electrically connected to the temperature sensor 9; the controller 10 is used for controlling the preheating burner 6 to burn to heat the catalytic burner 4 when the gas water heater is started, and controlling the preheating burner 6 to be extinguished when the temperature of the catalytic burner 4 reaches above the catalytic light-off temperature.
In this embodiment, the fan 1, the gas water heater and the gas inlet valve may be all of the existing type, and will not be described in detail here. The jacket heat exchanger 3 is a heat exchanger that uses an interlayer space to exchange heat for water placed therein. The jacket heat exchanger 3 is provided with a water inlet 34 to facilitate the continuous introduction of cold water in connection with an external circulation line. The jacket heat exchanger 3 and the main heat exchanger 8 can be directly communicated or indirectly communicated through a pipeline.
The catalytic burner 4 generally comprises a catalyst support and a catalyst disposed on the catalyst support, the catalyst generally having a fixed catalytic light-off temperature, i.e. when the temperature of the catalytic burner 4 itself reaches the catalytic light-off temperature, the fuel gas flowing through it will undergo flameless combustion with the oxygen in the air under the action of the catalyst to release heat. In order to increase the adhesion area of the catalyst and thus the catalytic space, the catalyst carrier generally adopts a heat-resistant honeycomb structure.
The bottom shell 5 provides a containing space for the preheating burner 6 and the main heat exchanger 8, and can form a support for the heat collection tube 7. It will be appreciated that the air outlet of the fan 1 and the air outlet of the gas inlet line are in communication with the lower combustion chamber 51.
The preheating burner 6 may employ an existing gas burner, for example, the gas water heater further includes an igniter 13, and the igniter 13 is used to ignite the gas injected from the preheating burner 6. That is, under the control of the controller 10, the igniter 13 operates in association with the intake valve.
The heat collection cartridge 7 is used to simply separate the heat exchange chamber 350 and cooperate with the exhaust port 52 to flow heat and hot gas streams along the path of the preheat burner 6, catalytic burner 4, jacket heat exchanger 3, and main heat exchanger 8. Under the action of the heat collection cylinder 7, the air flow heated by the preheating burner 6 acts on the catalytic burner 4 in a concentrated way, so that the heating speed of the catalytic burner 4 is increased.
According to the gas water heater, the catalytic burner 4 is arranged above the preheating burner 6, flame combustion is firstly carried out on the preheating burner 6, the heat collecting cylinder 7 separates the lower combustion chamber 51 from the smoke outlet 52, and under the guiding action of the heat collecting cylinder 7, heat radiation and hot air flow intensively act on the catalytic burner 4, so that the heating speed of the catalytic burner 4 can be improved.
When the temperature of the catalytic combustor 4 reaches above the preset catalytic light-off temperature, self-sustaining catalytic combustion of the mixed gas of air and fuel gas can occur on the catalytic combustor 4, and the fuel gas can be combusted on the catalytic combustor 4 at a lower temperature due to the catalytic action of the catalyst, and the fuel gas is almost completely combusted, and almost no CO is discharged. The temperature of the flue gas after catalytic combustion is lower than that of flame combustion, so that low emission of nitrogen oxides can be realized.
The hot air flow in the upper combustion chamber 30 can firstly exchange heat with the jacket heat exchanger 3, then flows downwards along the annular space between the heat exchange chamber 350 and the heat collection cylinder 7 to exchange heat with the main heat exchanger 8 arranged below the jacket heat exchanger 3, and finally is discharged through the smoke outlet 52; meanwhile, the water to be heated flows in from the water inlet 34 of the jacket heat exchanger 3, flows through the gum cover heat exchanger 3, then enters the main heat exchanger 8, and finally flows out from the water outlet 82 on the main heat exchanger 8. Therefore, the water is heated twice in the heat exchange process, and the energy utilization rate and the heating efficiency are effectively improved.
Further, the jacket heat exchanger 3 comprises an inner container 31 and an outer shell 32 which are mutually nested from inside to outside, the inner container 31 surrounds and forms the upper combustion chamber 30, the inner container 31 comprises a spherical crown-shaped inner top wall 311 and a cylindrical inner side wall 312 which extends downwards from the edge of the inner top wall 311, the concave surface of the inner top wall 311 faces downwards, and the catalytic burner 4 extends horizontally and is arranged opposite to the concave surface of the inner top wall 311.
In this embodiment, the concave surface of the inner top wall 311 may perform a more gentle direction of the flow of hot gas flowing toward the inner top wall 311, so that the flow of gas flowing through the catalytic burner 4 may flow more sequentially to the annular space between the heat exchange chamber 350 and the heat collection tube 7; meanwhile, under the reflection effect of the inner top wall 311, the heat radiation can be better concentrated on the catalytic burner 4 before the catalytic burner 4 reaches the catalytic temperature, so that the heating speed is increased. The catalytic burner 4 is arranged horizontally, which is advantageous for more absorbing the heat flowing through the hot gas flow.
Further, the liner 31 further includes an annular flange 313 turned outwards from the bottom edge of the inner side wall 312, the outer shell 32 includes a spherical crown-shaped outer top wall 321, and a cylindrical outer side wall 322 extending downwards from the edge of the outer top wall 321, the concave surface of the outer top wall 321 is downwards, and the bottom edge of the outer side wall 322 is in sealing connection with the flange 313.
In this embodiment, the outer shell 32 can be better sleeved with the inner container 31 by providing the flange 313. Preferably, the flange 313 protrudes from the outer peripheral surface of the outer side wall 322, and the rim 53 is formed by folding the open edge of the bottom case 5 outwards, and the rim 53 is overlapped and sealed with the flange 313. The inner side wall 312 and the outer side wall 322 are all circular in cross section, and a heat exchange interlayer cavity 33 with uniform radial thickness is formed between the inner side wall 312 and the outer side wall 322.
Further, a water inlet 34 of the jacket heat exchanger 3 is opened at the top of the housing 32. The water inlet 34 of this embodiment is arranged to ensure that the initially introduced water exchanges heat with the part of the jacket heat exchanger 3 having the highest temperature first, because the top wall of the jacket heat exchanger 3 opposite to the opening absorbs the heat of the catalytic heat exchanger most.
Further, the bottom case 5 includes an upper accommodating tube 54 and a lower accommodating tube 55 disposed upwardly open, the upper end of the upper accommodating tube 54 is sealed and abutted with the opening of the jacket heat exchanger 3, a connection port 541 is centrally provided on the bottom wall of the upper accommodating tube 54, the opening of the lower accommodating tube 55 is sealed and abutted with the connection port 541, and the lower combustion chamber 51 is formed in the lower accommodating tube 55.
In the present embodiment, since the preheating heater mainly functions to heat the catalytic burner 4, the volume of the lower combustion chamber 51 corresponding to the preheating heater and the horizontal cross-sectional area may be set smaller than that of the upper housing tube 54. Functionally, the upper housing tube 54 needs to be connected to the jacket heat exchanger 3 and form a space for housing the main heat exchanger 8, so that it is more reasonable to provide the bottom case 5 with a structure having a large upper portion and a small lower portion.
Further, the lower end opening of the heat collecting cylinder 7 is in sealing butt joint with the connection port 541, and the side wall of the heat collecting cylinder 7 is integrally provided with the side wall of the lower accommodating cylinder 55.
In this embodiment, the shell structures are preferably made of steel, such as a plate bending welding process, and the heat collecting cylinder 7 and the side wall of the lower accommodating cylinder 55 are integrally arranged, so that the heat collecting cylinder 7 and the side wall of the lower accommodating cylinder 55 are beneficial to adopting pipes with the same specification, thereby reducing the splicing process and reducing the cost.
Further, the upper end of the heat collecting cylinder 7 supports the catalytic burner 4, and the sidewall of the upper end of the heat collecting cylinder 7 is provided with a plurality of ventilation holes 71 along the circumferential direction.
In this embodiment, by providing the ventilation holes 71, the gas or hot gas which is then ignited is facilitated to flow back to the annular space between the heat exchange chamber 350 and the heat collection tube 7.
Further, the main heat exchanger 8 is combined with the inner wall surface of the upper accommodating cylinder 54, a water inlet interface 81 is arranged at the joint of the main heat exchanger 8 and the upper accommodating cylinder 54, and the water inlet interface 81 extends to the outer side of the upper accommodating cylinder 54 and is communicated with the main heat exchanger 8;
a water outlet port 35 is arranged at the outer wall surface of one end, adjacent to the bottom shell 5, of the jacket heat exchanger 3, and the water outlet port 35 is communicated with the inner cavity of the jacket heat exchanger 3; the gas water heater further comprises a connecting pipe 11 connected with the water outlet port 35 and the water inlet port 81.
In this embodiment, the connecting pipe 11 is externally arranged at the main body part of the gas water heater, which is more beneficial to the assembly production of the gas water heater. By providing the water outlet port 35 adjacent to the bottom case 5, and by combining the embodiment in which the water inlet port 34 is provided at the top of the jacket heat exchanger 3, the average path of water flowing in the jacket heat exchanger 3 can be lengthened, so that heat exchange efficiency can be improved.
Further, a smoke outlet 52 is provided between the main heat exchanger 8 and the bottom wall of the upper housing tube 54; therefore, the hot air flow or radiation can be discharged through the smoke outlet 52 after the heat exchange with the main heat exchanger 8, and the overall heat utilization rate of the gas water heater can be improved. Specifically, the gas water heater further includes a smoke exhaust pipe connected to the smoke outlet 52 and extending upward, so that a user can conveniently connect other smoke exhaust structures.
Further, the controller 10 is further configured to control the blower 1 to increase the amount of air taken per unit time and control the intake valve to increase the amount of gas taken per unit time to extinguish the preheating burner 6 when the temperature of the catalytic burner 4 reaches the catalytic light-off temperature or higher.
In this embodiment, by controlling the air and gas intake speed to reach the speed of the preheating burner 6 for the ignition line, the flame on the preheating burner 6 can be quickly extinguished, and then the catalytic combustion from the catalytic burner 4 can be switched.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. A gas water heater comprises a fan, a gas inlet pipeline and an air inlet valve connected in series with the gas inlet pipeline; the gas water heater is characterized by further comprising:
the jacket heat exchanger is arranged in a downward opening manner and is enclosed to form an upper combustion chamber;
a catalytic combustor mounted in the upper combustion chamber;
the bottom shell is upwards opened, and a lower combustion chamber is formed at the lower part of the inner cavity of the bottom shell; the bottom shell is provided with a smoke outlet communicated with the upper part of the inner cavity of the bottom shell; the opening of the bottom shell is in sealed butt joint with the opening of the jacket heat exchanger to form a heat exchange chamber;
a preheating burner installed in the lower combustion chamber;
a heat collection cylinder arranged in the heat exchange chamber and provided with two open ends, one end of the heat collection cylinder is connected with the upper combustion chamber, and the other end of the heat collection cylinder is connected with the lower combustion chamber;
the main heat exchanger is arranged in the heat exchange chamber, sleeved on the periphery of the heat collection cylinder and communicated with the jacket heat exchanger;
a temperature sensor for detecting a temperature of the catalytic burner; and
the controller is electrically connected with the temperature sensor; the controller is used for controlling the preheating burner to burn to heat the catalytic burner when the gas water heater is started, and controlling the preheating burner to be extinguished when the temperature of the catalytic burner reaches above the catalytic light-off temperature.
2. The gas water heater as recited in claim 1, wherein the jacketed heat exchanger includes an inner liner and an outer shell nested with each other from inside to outside, the inner liner encloses an upper combustion chamber, the inner liner includes a dome-shaped inner top wall, and a cylindrical inner side wall extending downward from an edge of the inner top wall, a concave surface of the inner top wall is downward, and the catalytic burner extends horizontally and is disposed opposite to the concave surface of the inner top wall.
3. The gas water heater as recited in claim 2, wherein said liner further comprises an annular flange turned outwardly from a bottom edge of said inner sidewall, said outer shell comprises a dome-shaped outer top wall, and a cylindrical outer sidewall extending downwardly from an edge of said outer top wall, said outer top wall having a concave surface facing downwardly, said bottom edge of said outer sidewall being sealingly connected to said flange.
4. A gas water heater as claimed in any one of claims 1 to 3, wherein the water inlet of the jacketed heat exchanger is provided at the top of the housing.
5. The gas water heater as recited in claim 1, wherein the bottom shell comprises an upper accommodating cylinder and a lower accommodating cylinder arranged upwards in an opening manner, the upper end of the upper accommodating cylinder is in sealing butt joint with the opening of the jacket heat exchanger, a connecting port is formed in the middle of the bottom wall of the upper accommodating cylinder, the opening of the lower accommodating cylinder is in sealing butt joint with the connecting port, and the lower combustion chamber is formed in the lower accommodating cylinder.
6. The gas water heater as recited in claim 5, wherein the heat collection tube has an opening at a lower end thereof in sealing engagement with the connection port, and a side wall of the heat collection tube is integrally provided with a side wall of the lower housing tube.
7. The gas water heater as claimed in claim 5 or 6, wherein the upper end of the heat collecting cylinder supports the catalytic burner, and a sidewall of the upper end of the heat collecting cylinder is provided with a plurality of ventilation holes along a circumferential direction.
8. The gas water heater according to claim 6, wherein the main heat exchanger is attached to the inner wall surface of the upper accommodating cylinder, a water inlet interface is arranged at the joint of the main heat exchanger and the upper accommodating cylinder, and the water inlet interface extends to the outer side of the upper accommodating cylinder and is communicated with the main heat exchanger;
a water outlet port is arranged at the outer wall surface of the jacket heat exchanger adjacent to one end of the bottom shell, and the water outlet port is communicated with the inner cavity of the jacket heat exchanger; the gas water heater also comprises a connecting pipe connected with the water outlet interface and the water inlet interface.
9. The gas water heater as recited in claim 5, wherein the smoke vent is open between the main heat exchanger and the bottom wall of the upper housing cylinder.
10. The gas water heater as recited in claim 1, wherein said controller is further configured to control said fan to increase the amount of air intake per unit time and said intake valve to increase the amount of gas intake per unit time to extinguish said pre-heat burner when the temperature of said catalytic burner is above the catalytic light-off temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710777955.1A CN109425097B (en) | 2017-08-31 | 2017-08-31 | Gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109425097B true CN109425097B (en) | 2024-02-23 |
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| CN111692751A (en) * | 2019-03-14 | 2020-09-22 | 芜湖美的厨卫电器制造有限公司 | Combustion heat exchange assembly and gas water heater with same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3908602A (en) * | 1972-10-04 | 1975-09-30 | Andre Brulfert | Steam or hot water generator using the catalytic combustion of hydrocarbons |
| US4271789A (en) * | 1971-10-26 | 1981-06-09 | Black Robert B | Energy conversion system |
| EP0578131A1 (en) * | 1992-07-10 | 1994-01-12 | Buderus Heiztechnik GmbH | Hot water heater with catalytic bruner |
| CN105841340A (en) * | 2016-05-13 | 2016-08-10 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
| CN106642646A (en) * | 2015-10-29 | 2017-05-10 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater and control method thereof |
| CN207196906U (en) * | 2017-08-31 | 2018-04-06 | 芜湖美的厨卫电器制造有限公司 | A kind of gas heater |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT399947B (en) * | 1991-06-03 | 1995-08-25 | Vaillant Gmbh | Combustion-chamber shaft for a water heater |
| AT508785B1 (en) * | 2010-01-11 | 2011-04-15 | Wiedlroither Johann | DEVICE FOR HEATING A FLUID |
-
2017
- 2017-08-31 CN CN201710777955.1A patent/CN109425097B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4271789A (en) * | 1971-10-26 | 1981-06-09 | Black Robert B | Energy conversion system |
| US3908602A (en) * | 1972-10-04 | 1975-09-30 | Andre Brulfert | Steam or hot water generator using the catalytic combustion of hydrocarbons |
| EP0578131A1 (en) * | 1992-07-10 | 1994-01-12 | Buderus Heiztechnik GmbH | Hot water heater with catalytic bruner |
| CN106642646A (en) * | 2015-10-29 | 2017-05-10 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater and control method thereof |
| CN105841340A (en) * | 2016-05-13 | 2016-08-10 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
| CN207196906U (en) * | 2017-08-31 | 2018-04-06 | 芜湖美的厨卫电器制造有限公司 | A kind of gas heater |
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